I plugged in my external harddrive (which was formatted on my Mac into HFS+ journaled) to my Ubuntu desktop 9.04 64bit. I am not able to get the drive to mount with write capability, how do I do that? Right now all I'm getting is read access, I tried

Do note that "Disabling journaling on your main OS X partition is not recommended however as journaling is an important feature of any filesystem that can prevent damage and data loss" (help.ubuntu.com/community/hfsplus)
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HayNov 6 '10 at 13:00

@Hay you can re-enable journaling. All it does is help the system recover faster in such an event (ie. abnormal shutdown). Not the end of the world.
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John TNov 6 '10 at 16:15

6

No, that's not all journaling does. It also helps prevent filesystem corruption, which could be serious enough to only be fixable with a reformat.
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Wade WilliamsApr 27 '11 at 4:26

6

in macos 10.6.8, in step 3, open the file menu with "option+alt" pressed
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commonpikeJun 10 '12 at 17:29

@JohnT Could you please provide a source for the fact that "Ubuntu only has support for writing to non-journaled HFS+ volumes" please? I'm doing some research on HFS+ and it would be very useful. Thank you.
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kalaraceyJan 13 '13 at 3:37

To disable journaling, just boot into OS X and fire up Disk Utility. Click on your HFS partition, hold the Option key, and click File in the menu bar. A new option to Disable Journaling will come up in the menu. Click that, and reboot into Linux. You should have read and write access to your HFS partition—however, the permissions on your Mac user's home folder will prevent you from reading or writing those files. we just need to change our UID in one OS so that it matches the UID in the other. Unless you have a reason for choosing otherwise, we're going to change our Linux UID to match our OS X one, since it's a bit easier. By default, the first user in OS X has a UID of 501, but you can double check this by going into System Preferences in OS X, right-clicking on your user, and hitting Advanced Options. If your User ID is something different from 501, replace 501 with your other UID in the terminal commands below.

Boot into Linux (we're using Ubuntu in this example) and fire up the Terminal. First, we're going to add a temporary user, since we don't want to edit a user that we're currently logged into. So, run the following commands in the Terminal, hitting Enter after each one:

Type in a new password for the temporary user when prompted. Reboot and log in as tempuser. Then, open up the Terminal and type in the following commands, once again hitting enter after each one (and replacing yourusername with your Linux user's username):

This will change your Linux user's UID to 501 and fix your home folder permissions so that you still own them. Now, you should be able to read and write to both your Mac and Linux user's home folder, no matter what OS you're logged into.

You may also want to fix your login screen, since by default Ubuntu won't list users with a UID of less than 1000. To do this, just open a Terminal and run gksudo gedit /etc/login.defs and search for UID_MIN in the text file. Change that value from 1000 to 501, and when you reboot your user will be listed in the login screen.

While this link may answer the question, it is better to include the essential parts of the answer here and provide the link for reference. Link-only answers can become invalid if the linked page changes.
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DavidPostillNov 11 '14 at 6:26